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Legal Contingencies (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Environmental Protection Agency [Member]  
Loss Contingencies [Line Items]  
Loss contingency accrual $ 694us-gaap_LossContingencyAccrualAtCarryingValue
/ us-gaap_LitigationCaseAxis
= lmia_EnvironmentalProtectionAgencyMember
Missouri Attorney General [Member]  
Loss Contingencies [Line Items]  
Loss contingency accrual $ 175us-gaap_LossContingencyAccrualAtCarryingValue
/ us-gaap_LitigationCaseAxis
= lmia_MissouriAttorneyGeneralMember
Tech Investments LLC [Member]  
Loss Contingencies [Line Items]  
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 5.50%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lmia_TechInvestmentsLLCMember
Common Stock, Other Shares, Outstanding 360,301us-gaap_CommonStockOtherSharesOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lmia_TechInvestmentsLLCMember